Pattern Syntax Checker If You want Explanation Check Video: Sample Input 3 ([A-Z])(.+) [AZ[a-z](a-z) batcatpat(nat Sample Output Valid Invalid Invalid Code: import java.util.Scanner; import java.util.regex.*; public class Solution { public static void main(String[] args){ Scanner in = new Scanner(System.in); int testCases = Integer.parseInt(in.nextLine()); while (testCases> 0 ){ String pattern = in.nextLine(); //Write your code try { ...